ext4: Add inode version support in ext4
This patch adds 64-bit inode version support to ext4. The lower 32 bits are stored in the osd1.linux1.l_i_version field while the high 32 bits are stored in the i_version_hi field newly created in the ext4_inode. This field is incremented in case the ext4_inode is large enough. A i_version mount option has been added to enable the feature. Signed-off-by: NMingming Cao <cmm@us.ibm.com> Signed-off-by: NAndreas Dilger <adilger@clusterfs.com> Signed-off-by: NKalpak Shah <kalpak@clusterfs.com> Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NJean Noel Cordenner <jean-noel.cordenner@bull.net>
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